Fix VID MariaDB docker tag

Change-Id: I1a1117512826e18e58de5e6fde7134ed3c36ad8e
Issue-ID: VID-93
Signed-off-by: Ofir Sonsino <os0695@att.com>

boot/vid_vm_init.sh

@@ -9,9 +9,9 @@ cd /opt/vid
 git pull
 cd /opt
 
+docker pull mariadb:10
 docker login -u $NEXUS_USERNAME -p $NEXUS_PASSWD $NEXUS_DOCKER_REPO
 docker pull $NEXUS_DOCKER_REPO/openecomp/vid:$DOCKER_IMAGE_VERSION
-docker pull $NEXUS_DOCKER_REPO/library/mariadb:10
 
 docker rm -f vid-mariadb
 docker rm -f vid-server